javascript input validation

i am using javascript validation for my input box from javascript-coder but i have 2 problems here.

First: The validator in the script uses name to validate the object, is it possible to change to id in the gen_validatorv4.js and how?

Second: my page reloads itself despite of alert produces by the textbox. it's suppose to stay on the page and allow user to correct error.

below is my script placement

    function submitform(){
    var frmvalidator  = new Validator("myform");
    frmvalidator.addValidation("amountperIteration","numeric","Name a price greater than $25");
    frmvalidator.addValidation("amountperIteration","gt=25","Name a price greater than $25");
    
    document.forms[0].submit();
}

my html code is simplify to something like that: (my back end is using python)

 <form action="{{ request.path }}" name="myform" method="post" enctype="multipart/form-data" onsubmit="return false">
 <input type="text" name="amountperIteration">
 <input type="submit" value="submit" onclick="submitform&q开发者_StackOverflow社区uot;>
 </form>

Any advice?

To answer your second question:

If validation fails, you want to return false from the submit handler:

function submitForm() {
    var result = validate(this);

    if ( result === false ) { return false; }
}

That way the form submission process will be canceled.